Pulsed Duty-Cycle Control to Constant DC (Low State)

Discussion in 'General Electronics Chat' started by Jeff Lange, Jan 4, 2012.

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  1. Jeff Lange

    Thread Starter New Member

    Jan 4, 2012
    I've done some research and I came across a few threads here, but I have a somewhat unique situation.

    What I have is a duty-cycle controlled DRL system in a car, (I unfortunately do not know the frequency of this signal yet). So what happens is the high-beam bulb (12V 65W), is in one of 3 states: off (0V), on (12V), or DRL (12V pulsed to give approximately 50% light output).

    What I need, however, is to turn on a control solenoid when the high beams are on (constant 12V), but I do not want it to see any voltage in the other 2 states (off or DRL). Obviously off is easy enough, but the solenoid would be damaged by the duty-cycle control, so I need it to not be getting any power when the high-beam bulb is in DRL mode.

    Can anyone think of any way to do this, relatively simply?

    Thanks so much for the help!

  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    You mentioned "car".

    If I understand it right you want to do a modification on a vehicle. These discussions are not allowed according to the AAC forums ToS.

    Here you can find member selected forums where you might be able to find help.
  3. bertus


    Apr 5, 2008

    Sorry, we can not help you with the daytime running light system.

    I am closing this thread as it violates AAC policy and/or safety issues.

    6. Restricted topics. The following topics are regularly raised however are considered “off-topic” at all times and will results in Your thread being closed without question:

    • Any kind of over-unity devices and systems
    • Automotive modifications
    • Devices designed to electrocute or shock another person
    • LEDs to mains
    • Phone jammers
    • Rail guns and high-energy projectile devices
    • Transformer-less power supplies
    This comes from our Tos:
    Terms of Service
    There will be enough sites where automotive questions can be discussed :
    Member selected automotive forums

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